<?php

$num = 90;

$num = 1000;

$num = "xuebingis";

$orderId = 54360456;

$order_id = 456456456;

$a;

$a = 90;

$num =90;

echo $num;

var_dump($num);

// print($num);

// print_r($num);

// printf($num);
// 

